The HYDRATION Study

The HYDRATION Study (Hydration at Yale During Radiography and Treatment of Iliac Obstruction) will assess the impact of intravenous fluid administration on the size and morphology of pelvic veins. This study will assess how the variation in hydration status affects the diameter of the pelvic veins and how this change in vein size impacts the detection of venous lesions causing outflow obstruction. Participants will complete a screening questionnaire, which includes health-related questions. They will then undergo two magnetic resonance venographies with contrast before and after administration of a pre-specified volume of fluid via intravenous cannulation. The study will take between two and three hours for participants to complete.